WPF: WPF Data Binding Converter

Following Post explains how to create Converter for WPF data binding.
For example we need to bind Lable control to his Background propertie:

<Label.Background>

<Binding Path="BranchColor">...

but in Data Source we are getting string instead of Color: Red, Blue, Green and so...

We need to create converter that will possible to convert string "colors" to System.Windows.Model class.

We need to perform following steps:

1. Write Converter class with converts and Converts back methods:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;
using System.Globalization;
using System.Windows.Media;
using System.Drawing;

namespace GarageManager.Converters
{
   [ValueConversion(typeof(decimal), typeof(string))]
   public class BrushesConverter : IValueConverter
   {
   public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
   {
   if (value == null)
   return null;
   BrushConverter convertor = new BrushConverter();
   return convertor.ConvertFromString(value.ToString());
   }
   public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
   {
   if (value == null)
   return null;
   BrushConverter convertor = new BrushConverter();
   return convertor.ConvertToString(value);
   }
   }
}

2. Register it on our XML file where we writing data binding:

xmlns:local="clr-namespace:GarageManager.Converters"

3. and perform data biding with converter:

<Label.Background>

<Binding.Converter>

<local:BrushesConverter></local:BrushesConverter>

</Binding.Converter>

</Binding>

</Label.Background>

</Label>

Hope it's HELPS,

Thanks,

Alex.

WPF

יום חמישי, 7 באפריל 2011

WPF Data Binding Converter

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